提出一种基于数字化混沌密码系统的改进算法。
An improved encryption algorithm based on digital chaotic coding system is proposed.
分别对两种对称混沌密码系统进行了密码分析。
Cryptanalysis of two different kinds of symmetric chaotic cryptosystems is presented.
由于混沌理论和密码系统之间存在的自然联系，应用数字化混沌密码的想法得到了越来越多的关注。
Because of the intrinsic relation between chaotic systems and cryptosystems, the idea of using digital chaotic ciphers has attracted more and more attention.
论文的研究工作将对数字化混沌密码的应用提供参考，并将为数字化视频加密传输与监控系统提供一种可行方案。
The study result will be a reference for digital chaotic cipher application and provide a feasible scheme for digital video encryption transmission and monitoring system.
而混沌系统具有对初始条件敏感性、随机性、相关性等优良的密码学性能，能够产生性能良好的伪随机序列，所以很适合于序列加密。
Chaotic systems are sensitive to the initial condition, randomness and correlativity. They can produce good pseudo - stochastic sequences. Therefore, these systems are suitable to the stream cipher.
混沌流密码加密方案：利用时空混沌系统产生伪随机性能良好的二值序列，并通过了一系列性能检测，实现了对图像和语音文件的流密码加密。
Chaotic stream cipher scheme: good binary sequences are generated using chaotic system, and after performance tests the sequences are applied to encrypt images and speech signals.
混沌系统具有良好的伪随机性、长期的不可预测性、对初始值的高度敏感性等特性，这就决定了混沌系统可以应用于密码学领域。
The characteristics of the chaotic system, such as well pseudorandom, long inscrutability, high sensibility to the initial value, make it be applied in the code field.
混沌理论与密码学之间存在着千丝万缕的联系，混沌系统的动力学特性满足密码系统的某些安全性能需求。
There are inextricably links between chaos theory and simple cryptography, and chaotic dynamics shows some features that are desirable for the cipher system.
应用混沌反控制思想产生超混沌，根据超混沌系统的伪随机特性进行流密码设计。
This paper USES chaos anti-control idea to generate a hyper-chaotic system, and USES the pseudo-random feature of hyper-chaotic system to design a stream cipher.
在时空混沌用于构建密码系统的工作中，我们利用耦合映象格子模型构建了一个基于一次一密乱码本的分组密码。
In the research of the application of CML to cryptography, CML is used to build a block cipher based on one-time pad technique.
二十世纪80年代以来，用数字化混沌系统构造密码系统受到了越来越多的关注。
Since the 1980s, more and more attentions have been given to constructing a cipher system with digital chaotic system.
一般而言，目前存在两种混沌密码形式：一种是模拟化的混沌保密系统；
Generally speaking, there are two kinds of chaotic cipher: one is the analog chaotic secure communications;
一般而言，目前存在两种混沌密码形式：一种是模拟化的混沌保密系统；
Generally speaking, there are two kinds of chaotic cipher: one is the analog chaotic secure communications;
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